AWWA C200 Steel Water Pipe Water pipeline AWWA C200 steel water pipe is widely used in the following fields / industries : Hydraulic power station , potable Water supply industry , irrigation penstock , Sewage disposal pipe line
AWWA C200 standards covers butt-welded , straight-seam or spiral-seam steel pipe , 6 in . ( 150 mm ) and larger , for transmission and distribution of water , including fabrication of pipe , requirements of welding operations , permissible variations of weight and dimensions , preparation of ends , fabrication of specials , inspection , and test procedures .
Inspection
All work performed and material furnished under this standard may be inspected by the purchaser , but such inspection shall not relieve the manufacturer of responsibility to furnish material and perform work in accordance with this standard .
Quality assurance
The manufacturer shall maintain a quality-assurance program to ensure that minimum standards are met . It shall include a certified welding inspector ( AWS QC1 ) to verify that welders and welding procedures are qualified , procedures are being followed with limitation of testing , and quality-assurance functions are being implemented .
Defects
The finished pipe shall be free from unacceptable defects . Defects in seamless pipe or in the parent metal of welded pipe will be considered unacceptable when the depth of the defect is greater than 12.5 % of the nominal wall thickness .
The repair of defects will not be permitted if the depth of the defect exceeds 1 / 3 of the nominal wall thickness of the pipe and if the length of that portion of the defect in which the depth exceeds 12.5 % is greater than 25 % of the outside diameter of the pipe . Each length of repaired pipe shall be tested hydrostatically in accordance with standard requirements .
Marketing
A serial number or other identification shall be painted in a conspicuous location on each section of pipe and each special section .